Influence of Fly Ash on Unconfined Compressive Strength of Cement-Admixed Clay at High Water Content
Publication: Journal of Materials in Civil Engineering
Volume 22, Issue 1
Abstract
This research studies the potential of using disposed fly ash to add up or partially replace Portland cement Type I in ground improvement by cement column technique. The strength characteristic of cement-fly ash admixed Bangkok clay was investigated by means of a series of unconfined compression tests, paying special attention to the influence of ground fly ash in this mixture. From testing results, the unconfined compressive strength and elastic modulus improved with an increasing of fly ash content. With the cement portions of greater than or equal to 10%, ground disposed fly ash could be employed as a pozzolanic material for partial replacement of cement in cement column construction. Based on the equivalent cementitious material content concept, an empirical equation relating the efficiency factor, with mixing proportions was proposed. Then, together with this proposed efficiency factor, strength prediction of cement-fly ash admixed clay by Feret’s equation and Abram’s law were carried out and discussed.
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Acknowledgments
The writers are grateful for financial supports from the Thailand Research Fund (TRF) (Grant No. UNSPECIFIEDMRG4780037) and from King Mongkut’s University of Technology Thonburi (KMUTT) research fund. The guidance and contribution of Professor Chai Jaturapitakkul are gratefully acknowledged.UNSPECIFIED
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 22 • Issue 1 • January 2010
Pages: 49 - 58
Copyright
© 2010 ASCE.
History
Received: May 18, 2007
Accepted: Aug 10, 2009
Published online: Dec 15, 2009
Published in print: Jan 2010
Notes
Note. Associate Editor: Maria C. G. Juenger
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